Reliability of Rotor Transmission System

 

Perform an analysis at system level using FTA and FMECA to assess failure of the IGB. This should consider the reliability at the point of dispatch as well as
in flight.
Discussion of system reliability issues and recommendations for changes to design or maintenance tasks in relation to FTA and FMECA Analysis.
Task 2
Your analysis should now be expanded to include the reliability of the Main gearbox lubrication system. Figure 3 shows a Reliability Block Diagram for Loss of
Oil Pressure. This should be integrated into your analysis for the transmission system. Although the analysis should focus on the IGB and Main Gearboxes,
you should consider the effect of reliability on aircraft safety as a whole. For any critical items, you should suggest possible maintenance actions, either
preventative or corrective, and/or any condition monitoring for dormant faults. You will need to justify your analysis with your own research and good
engineering judgment. However, there is no need to develop any aircraft diagrams.
Also discuss the system reliability issues and recommendations for changes to design or maintenance tasks.

 

Sample Solution

Failure Mode and Effects Analysis (FMEA) is a tool that is used to assess the potential system failures in order to identify the risks associated with them. It evaluates each component of a system as well as its interactions to identify possible issues that may arise due to malfunctions, design flaws, or incorrect maintenance procedures. FMEA also helps determine the severity of a failure by assigning it an impact level based on how severe its consequences could be for the aircraft’s safety and performance.

Fault Tree Analysis (FTA) is another method used to evaluate system reliability during operation. This technique uses logic diagrams that allow engineers to model various events and analyze their impacts on overall system functionality. The diagrams represent multiple causes of failure which are related through logical connections such as AND gates and OR gates. By doing this analysis, engineers can better understand how different components interact with one another and what would happen if any fault should occur in any particular part of the system.

In order to assess failure of an Integrated Gas Generator (IGB), both FTA and FMEA should be employed by aircraft designers and operators alike, since they offer different perspectives on failure risk assessment that complement one another well. FTA offers insight into potential root cause scenarios for IGB failures while FMEA assesses their individual impacts at both dispatch points as well as in-flight situations. Through these analyses, designers can optimize designs for improved reliability by optimizing components configurations or introducing redundancies where necessary; operating personnel can then employ appropriate maintenance practices tailored towards reducing likelihoods of failure occurrence or mitigating potential damage when faults do arise (Hassan et al., 2020).

Cyberstalking comes under the typology of cyber-violence, which is an online behaviour that leads or constitutes to assault against the well-being of an individual, or a group (Herring, 2002). As, cyberstalking is involved using the internet to gather personal information about the victim, this is a violation of privacy creating a form of intimidation leading to in some cases explicit threats. This can affect the victims’ emotion, psychological and physical well-being. Ellison and Akdeniz (1998) had constructed the term cyberstalking as an online harassment, due to the crucial component of harassment being a repetitive behaviour. The main element of this case is ‘cyberstalking’ with the involvement of ‘harassment’. This brings in theory by Ellison & Akdeniz (1998), as the harassment of Rosica was repetitive until reported. In addition, other claims stated, “seven other women have told authorities that he also harassed them in a similar fashion to the victim in the criminal case”.

The first theory that is going to be discussed is, ‘Space Transition Theory (STT)’ (Jaishankar, 2008) which was created to demonstrate the causation of crimes in cyberspace. STT is an explanation about the nature of the behaviour of the individual who brings out their non-conforming and conforming behaviour in the physical and cyberspace. This theory argues that people tend to behave differently when moving from one space to another.

 

 

The second theory is ‘Liquid Modernity’ developed by Bauman. In liquid modernity, the web has a momentary value, the past and future become meaningless as coordinates of the psychological life of the individuals’ present (Bauman, 2009). The reason and reality tend to break down the subject having the illusion of being omnipotent, omnipresent and immortal (Carabellese et al., 2014). Therefore, on the web, the other cannot be met as a real person but in terms of an empty simulacrum, convenience and appearance (Baudrillard, 1981), lacking its own identity defined in its spatial and temporal coordinates (Cassinari, 2005).

Space Transition Theory concludes seven key postulates, (1) person, with repressed criminal behaviour (in the physical space) have a propensity to commit a crime in cyberspace which they would not commit in physical space, due to their status and position. Due to Rosica being an ex-cop restricted him committing a behaviour in physical space, as he had to maintain his status and position of being an ex-cop. (2) Identity flexibility, dissociative anonymity and the lack of deterrence factor in the cyberspace provides offenders with the choice to commit cybercrime. Rosica had the accessibility to create a fake online identity in which he did (Katy Jones), this was the identity flexibility factor. This meant that his real identity was hidden/

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